#define _CRT_SECURE_NO_WARNINGS 1
#include <cmath>
#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
#include<math.h>
#include<stdlib.h>
#include<stdio.h>
#include<unordered_map>
using namespace std;

class Solution {
public:
    int getSum(int a, int b) {
        while (a & b)
        {
            int tmp = (a & b) << 1;
            a = a ^ b;
            b = tmp;
        }
        return a ^ b;
    }
};

int main() {
    return 0;
}